Solid color image pickup device

Abstract

Abstract PURPOSE: To obtain composite color sinals of NTSC by subjecting color video signals, which are obtained directly from a solid image pickup plate, to only a simple signal processing. CONSTITUTION: When mosaic color filter (a) is provided in front of the solid image pickup plate, Y and R signals and B and Y signals are obtained alternately at output lines 9 and 10 respectively. Here, the frequency of horizontal clock pulses of the horizontal scanning circuit of the solid image pickup device is defined as 7.16M Hz. Y signal selecting switching circuit 52 outputs Y signals and applies them to luminance signal process circuit 51 through LPF 35. BPF 36 and 37 have 3.58M± 500K Hz to obtain (R-Y) conswt and (B-Y) sinwt as outputs respectively. Phase shifter 38 delays the phase by π/2. A proper ratio is obtained by coefficient equipments 39 and 40, and two signals are added. Since the chrominance carrier frequency is an odd integral multiple of the horizontal scanning frequency in the NTSC system, the phase of the chrominance carrier wave is inverted by inverter 41 at every 1H. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Kenji Takahashi
• 👤 Shusaku Nagahara
• 👤 Kazuhiro Sato
• 👤 Masuo Umemoto
• 👤 Toshiyuki Akiyama
• 👤 Moriji Izumida

Bibliographic Details